Presser structure for shoe lasting machines



July 13, 1943. J. w. BARNA 2,324,129

PRESSER STRUCTURE FOR SHOE LASTING MACHINES Filed April 2, 1942 2Sheets-Sheet 1 J05 e m? fV $41774 y 1943. J. w; BARNA 2,324,129

PREfiSEWSTRUCTURE FOR SHOE LASTING MACHINES Filed April,2, 1942 2'Sheets-Sheet 2 "Patented July 13, 1 943 UNITED STATE PATENT OFFICEPRESSER STRUCTURE FOR SHOE LASTING MACHINES (Jhicago, Ill.

Application April 2, 1942, Serial No. 437,332

4 Claims.

My invention relates to presser structure for lasting and sole layingmachines for pressure application to soles for cementing thereof to thewelt or welted margin of shoe uppers held to lasts by wiper assemblies.

My invention may be considered as an improvement over the presserstructure arrangement such as is disclosed in my Patent No. 2,144,582,dated January 17, 1939, in which arrangement the presser foot issupported at the lower end of a threaded shaft which must be turned tobring the presser foo+u into pressure engagement with the sole to belaid. With such adjustment, the pressure of the foot is not alwayscertain unless the shaft, for each pressure engagement, is given thesame number of turns, and any overturning or underturning will, ofcourse, result in too great or too little pressure.

important object of my invention is to prv.'.de presser structure inwhich accurate adjustment may be made for predetermined pressuremovement of the presser foot together with actuating means, eachoperation of which will result in such predetermined movement, so thatin the laying of soles on a particular run of shoes the samepredetermined pressure will in each case be applied to the sole to belaid.

A further object of the invention is to provide presser structure whichpossesses maximum flexibility so that thepressure exerted upon operaticnof the actuating means will be uniformly distributed by the presserfoottothe sole to be laid.

Another important object is to provide presser structure for the purposedescribed which may be readily applied on various types of lastingmachines.

The above enumerated and other features of my invention are incorporatedin the structure disclosed on the drawings, in which:

Figure 1 is a front elevation of a lasting machine showing my improvedpresser structure thereon;

Figure 2 is an enlarged side elevation of the presser structure; and

Figure 3 is a section on plane III-III of Figure 2.

The lasting machine shown on Figure 1 is that of my Patent No.2,144,582. Briefly describing the machine, it comprises the bed Iii onwhich is mounted the base structure ii for supporting the variousoperating parts. Blocks l2 are slidable longitudinally on the basestructure by a shaft l3 operated by a handwheel i4, and these blockssupport pedestals l5 for the heel and toe wipers, all as shown in mypatent referred to, the drawings showing only the toe wipers [6. Postsi1 rising from the base structure H support the side wiper structuresiii. The toe and heel wiper supporting pedestals l5 are connected withcam structure's IS) on the tables 29 for shift of the pedestalscrosswise of the machine when these pedestals are moved longitudinallywith the wipers thereon, and, as disclosed in my patent referred to, theside wiper structures have connections With the toe and heel wipers formovement Widthwise of the machine when the toe and heel wipers are movedinto wiping engagement with an upper.

Describing now my improved presser structure, a supporting pedestal 2!therefor is mounted on the bed l8 and has a sleeve 22 journalled thereonfor swing in a horizontal plane. The presser structure comprises thebody 23 having a bar 24 extending therefrom for engagement in the sleeve22 in which it is adjustably secured as by means of a set screw 25.

The body 23 has the vertical bore 26 in which the bar 21 is slidable butheld against rotation as by a key 21. The bar has the bore 28 threadedin its lower end for reception of a threaded stem 29 having a polygonalhead 30 adjacent its lower end for application of a tool for adjustmentof the stem in the bar 21. The end 3| below the head 3!! is secured asby pin 32 to the upper member 33 of a universal coupling Whose othermember 34 has the cylindrical socket 35 receiving the stud 36 extendingfrom the support 31 to which the presser foot 38 is secured as by meansof screws 39. A link 40 is connected to the coupling member by pins 4|and 42 respectively which extend at right angles to each other. Presserfeet of different sizes may be secured to the universal coupling, andeach of the feet will have a stud 36 for engaging in the socket 3'! ofthe coupling. To hold the foot tothe coupling, the stud 36 is providedwith a circumferential channel 43 for receiving the end of a screw 34,the screw being applied to extend into the channel to hold the studagainst axial displacement but to permit rotary movement of the stud andthe foot from which it extends, the screw after setting being held by alock nut 45. The supporting plate. 31 for the foot is preferablyprovided with elongated slots 46 for the screw 39 so that the foot maybe adjusted longitudinally relative to the supporting plate.

Mounted on top of the bar 2'! is a U fitting 48 having a stud 39extending therefrom into the bore 28 of the bar, to be secured by a pin50.

The legs of the fitting 48 support a shaft 5| which journals a roller 52disposed between the legs. Extending laterally from the upper part ofthe body 23 are ears 5&- which support a shaft 54 above the shaft 5! forthe roller 52, and on the shaft 54 between the ears 53 is journalled acam 55 for cooperation with the roller 52. Springs 56 extend between theouter ends of the shafts 5i and 54 (Figure 2), these springs tending tohold the bar 2'! in its upper position with the rollerr 52 in engagementwith the cam 55. The cam is operable by a handle 5'! and has the camsurface 58 effective, upon clockwise rotation of the cam, to engage withthe roller 52 for downward movement of the bar 27 and the presser foot38 secured thereto by the universal coupling. Figure 1 shows the camrotated to bring the presser foot into pressing position with a sole Sfor pressing it downwardly for cementing thereof to the welt portion ofa shoe upper which has been wiped around a last supported in themachine, all in a manner as disclosed in my Patent No. 2,144,582. Thecam has the locking surface 59 which, when brought into engagement withthe roller 52, will lock the handle in its down position for holding thepresser foot in its pressing position. To release the foot, the handle51 is swung upwardly sufficiently to withdraw the holding surface 59from the roller 52 whereupon the springs 55 will then swing the cam toits normal position and will raise the bar 21 for raising of the presserfoot away from the sole. The entire presser structure may then be swungon the pedestal 2| to one side while another upper is being lastedpreparatory for thereto.

By adjusting the stem 29 in the bar 21, the pressure engagement of theshoe with a sole will be determined, and after such adjustment a locknut 63 will hold the stem in its adjusted positon and the connectionbetween the cam and the presser foot will be axially unyielding. Eachrotation of the cam 55 to its locking position will then move thepresser foot downwardly the same distance, and therefore the presserfoot will be applied with the same pressure to a run of uppers which arelasted by the machine.

The foot 33 is provided with a yieldable pad 6 I,

coupling, the foot can be turned to register accurately with a solebefore the cam is turned for downward movement of the foot against thesole. The universal coupling will then permit the foot to tilt and rockitself into full engagement with the sole when it is being shifteddownwardly by operation of the cam, so that the pressure will beuniformly distributed by the foot to the sole through the pad for properand uniform cementing of the sole to the upper.

I have thus produced presser structure for lasting and sole layingmachines which can be accurately adjusted for the desired pressureapplication and in which the lateral flexibility of the connection tothe presser foot insures uniform pressure application to a sole, andwhose operation by the cam insures, by virtue of the axial unyielding ofthe connection, the application of application of a sole and operationshown and described, as changes and modifications may be made withoutdeparting from the scope of the invention.

I claim as follows:

1. Presser structure for the purpose described comprising a body havinga vertical bore, a bar movable in said bore, cam means on said bodycooperable with said bar for movement thereof, a presser foot having astud extending therefrom, a universal coupling connected to said bar andhaving a socket for receiving said stud, said stud having an annularchannel, and a screw on said coupling projecting into said channel forholding said foot axially to said coupling but permitting rotationalmovement relative thereto.

2. A presser structure for the purpose described comprising a bodyhaving a vertical bore, a bar shiftable in said bore, a cam rollermounted on the upper end of said bar, a cam mounted on said body forengagement with said roller for downward shift of said bar, spring meanstending to hold said bar upwardly in engagement with said cam, a stemhaving threaded engagement in said bar and depending therefrom, apresser foot having a stud extending therefrom, a universal couplingsecured at one end to said stem and having a socket at its other endreceiving said stud, said stud having a circumferential channel, and ascrew on said coupling projecting into said channel to hold said shoeagainst displacement from said coupling but permitting rotationalmovement relative thereto.

3. A presser structure for the purpose described comprising a bodyhaving a vertical bore, a bar shiftable in said bore, a cam mounted onsaid body for effecting downward shift of said bar, spring means tendingto hold said bar upwardly in engagement with said cam, a stem havingthreaded engagement in said bar for axial adjustment relative theretoand depending therefrom, a presser foot, a universal coupling betweensaid presser foot and the end of said stem, said bar and said stem andsaid coupling providing an axially unyielding connection between saidpresser foot and said cam, and a yieldable pad on the underside of saidpresser foot for engagement with soles to be laid.

4. In a lasting and sole laying machine having a supporting base and awiper assembly mounted thereon, a presser structure comprising apedestal on the base, a presser body mounted on said pedestal formovement into position over the Wiper assembly, said pressure bodyhaving a vertical bore, a bar shiftable in said bore, a cam on said bodyadapted for camming engagement with said bar to effect downward shiftthereof, a stem extending downwardly from said bar, a presser foot, acoupling connecting said presser foot with the end of said stem, saidbar and said stem and said coupling providing an axially unyieldingconnection between said cam and the presser foot, said stem havingadjustable connection with said bar for adjustment of the length of saidconnection whereby for each operation of said cam the same pressure willbe transmitted through said connection to the presser foot, and ayieldable pad on said presser foot for uniform distribution of thepressure to soles to be laid on uppers in the wiper assembly.

JOSEPH W. BARNA.

